Weapon (elven glaive), legendary
The Diamond Spear, known as Wyrmhesh ("Dragonfrost"), is an elvish glaive and one of the Ten Teeth of the Sylvan Dominion.
Elvish glaive. 1d8 slashing, 6 lb., finesse, light, reach, versatile (1d10).
You gain a +1 bonus to attack and damage rolls made with this magic elven glaive.
When you hit a dragon with this weapon, the dragon takes an extra 3d6 slashing damage. If that dragon has a breath weapon that deals cold damage, it takes 3d8 slashing damage instead. For the purpose of this weapon, “dragon” refers to any creature with the dragon type.
When you make a saving throw against a dragon's breath weapon and succeed you take no damage. If you fail, you instead take half damage. If this dragons's breath weapons deals cold damage you have advantage on these saving throws.
